Valve



April 4, 1944 -w. H. MCGUNAGLE 2,345984 i kVALVE:

Filed May. 15, 1941 nl@ |l INVENTOR. w|LL|AM H.MGUNAG1 E ATTORNEYS Patented Apr. 4, 1944 William ll.McGunagle,- ,Clerelandc Ollio; assigner1 to..The Johnston &l Jennings Company, (llevelandg, Ohio, `at corporation of Ohio Application Mams, 1941; seriarNe; 393577# 1-o1aim. (Cnam- 33) Thetpresent invention relates to afvalverhaving two valve closure-'fl members; b'oth of'i'whichare operabley fromf a' singles actuating means-,- such asv a handlwh'eel; or-thelika and 'fwherein one '-of the valve: elements may bare-moved from= the valve housing for thel i purpose f of inspection; re

pairorfre-facing; while the-other valveielementl remainsin closedposition; The-f valve embodying the construction of-my present linventionl is particularly adapted forvuse as iafwaterf draw-oli' valvelinf petroleum containers suoli asf storage tanks-s and the like,- inasmuch i as necessaryre pairs-to onel et thefvalve elements may be merley while liquid" pressure is I'exerted' uponthe" valve, or withoutV theA necessityfof f'emptylngf'tlie 4storage tank.

A' further` advantage` of? the valve't construc-l tion of the-present*l invention is `that no liquid; suchf as water, is L retained-f in thevalvef housing after the valvefis closedl or-shu-t-oftso'rthat there willfbef-no opportunity`I for" havingfthevalve-rena dered inoperable, or even desti-oyed-f;` byA water freezingtherein. Furthermore, my invention renders possible the elimination of any valve stem packing which might require replacement from time to time.

Additional objects and advantages of my invention shall become apparent as the following description proceeds.

To the accomplishment of the foregoing and related ends, said invention then consists of the means hereinafter fully described and particularly pointed out in the claim, the annexed drawing and the following description setting forth in detail certain structure embodying the invention, such disclosed means constituting, however, but one of various structural forms in which the principle of the invention may be used.

In said annexed drawing:

Fig. 1 is a longitudinal, sectional View through the valve housing of a valve having the construction embodying the principle of my present invention; Fig. 2 is a longitudinal, sectional view through the valve housing and the valve elements, showing the latter in open position; and Fig. 3

`is a transverse, sectional view taken substantially along the line 3-3 of Fig. l.

Now referring more particularly to the drawing, the valve structure therein comprises a housing I of substantially cylindrical form, having a threaded portion 2, adapted to connect the valve to the threaded flange 3 on the shell 4 of an oil storage tank or the like. A threaded outlet opening 5 is provided in the side wall of the housing I.

Theinner end ofthe1 housing lhasa valve lseat 6i which isaadaptedto be engaged by the annularlvalve memberfor `disc 1. The valveV disc 'I is mounted`` on'- the end l of the valve i stem A 8,' which, inv turn,- einzendsthroughv the cylindrical guide 9: Theguide tlis-rnountedinv thev housing I lby meansfofztheiradialribs `I 0I;

A` transversef pinv IIl is carried' by the valve stema!! andispffsu'clentf Iength-atits outer endsto contactf' with the inwardly` extending abutments: I25on theY-insidewall of the housing I`. Thefpin IIals'o serves as an" abutment for the washer-f I3 1 agair'xstvwhichy onev end, of` the-coi1 compressionfspringld. bears.' "'.I'he'other end'of thespring lblbearsflagainst the end iof 'the valve guide 9:1 Thespring: lithus exerts its pressure sucha direction: as to urge tlievalve disc 'I towardslvclosed'fpositionor towardseengagement withfits seatl The valvef-stfz1n 8 also` has a threadedportion I5wl 1ich-- is,` adaptedtozengage with: theV interior of tlf-Ie: secondvalve sterne |61,l whichcarries the valve elementordisc.I I'I`.` Thef-latter isuadapted to engage with the seat I8 which is located intermediate the inlet valve seat 6 and the outlet opening 5. A removable valve facing, in the form of a ring I9, is carried by the seat-contacting face of the valve disc I1. The facing ring I9 is removably installed on the disc I1, in the customary fashion, by means of the washer 20 and the nut 2|.

The valve stem I6 has a reduced portion I6 which extends through an opening in the re movable valve bonnet or cover 22. The cover 22 is mounted on the housing I by means of suitable fasteners such as the stud bolts 24 and nuts 25. Preferably, one of these nuts is in the form of the loop nut 26 through which the hasp of a padlock (not shown) may be inserted to engage also with an opening in the hand-Wheel 23 to lock the Valve in closed position and to prevent unauthorized tampering or manipulation of the latter. The drain plug 2'I is located in the bonnet 22 and closes a. hole leading to a recess 28 surrounding the valve stem I6. 'I'he drain plug 21 is intended to be removed or replaced by a pipe nipple when the valve housing is installed at a position at right angles to that shown in the drawing (or in a vertical position) for draining the interior of the valve housing when the valve discs 'l and I1 are in closed position.

A beveled shoulder 29 is located at the end of the valve stem I6 and adapted to seat upon the complementary surface 3U in the cover 22.

shoulder 29 seats upon the complementary surface 30, Further rotation of the hand-wheel 23 j@ in the same direction as before, continues to unscreW the valve stem portion I5, but since thej valve stem I6 can no longer move in a righthand direcf tion, the valve stem 8 must move in a Ilefthand direction, against the pressure of the spring III,V

thus to open the valve disc 1.

In Fig. 2, the valve disc 'I is shown in a partially open position. When both of the valves 1 and I1 are opened, fluid flow through the valve housing I is effected. To close the valves, the handwheel is rotated in the opposite direction and the above-described movements are repeated in reverse order, viz.: The valve 1. first moves to closed position upon its seat 6 and the valve I1 is subsequently moved to closed position on its seat I8. From the foregoing description, it will be seen that the inlet valve 'l closes first, so that water or any other fluid remaining in the housing I will have an opportunity to drain outthrough the It will also be noted that no liquid sealing packing is required for the valve stem I6', since the shoulder 29, when seated upon the surface 30, operates to seal the stem I6 with respect to the housing I. There is no opportunity for leakage past the valve stem I6' prior to such seating of the shoulder 29 because the v'alve 1 is still closed and cannot be opened until this seating contact occurs.

Other modes of applying the vprinciple of my invention may be employed instead of the one vexplained, change being made as regards the structure herein disclosed, provided the means ljstated by the following claim or the equivalent of such stated means be employed.

. I, therefore particularly point out and distinctly 'claimfas my invention:

outlet passage 5 (and likewise through the hole in which the drain plug 21 is located if the valve is in vertical position), preventing v'any undesired freezing of liquid in the interior of the valve. When it is desired to remove the valve. I1, such as for inspection or renewal of the facing ring I9, the nuts 25 and the cover 22 are removed, and the stem I6, together with the valve disc I1, are unscrewed. During this removal, the compression spring I 4 holds the valve 1 in closed position so that liquid cannot flow through the valve.

A Valve ofthe character described, comprising .al cylindrical valve housing having one end terminating in an inlet opening and having an outlet opening in its side wall, a cover closing the opposite end of said housing, a valve adapted to close said inlet opening, a second valve and a vseat for said second valve located in the interior'of said housing at a point intermediate said inlet yand said outlet openings, a stem for said inlet valve projecting into the interior of said housing, a guide bushing for said inlet valve stem carried by said housing and located between said inlet 'opening and said second valve seat, a transversely extending pin carried by said valve stem, a spring mounted between said bushing and said pin for urging said inlet valve to closed position, an abutment on said housing adapted to be contacted by said pin for'limiting rotary movement of said' inlet valve stem, a second valve stem for said second valve slidably and rotatably mounted in -said cover, said inlet valve stem threadably engaging said second valve stern, whereby initial unthreading rotation of said valve stems with respect to each other operates to open said second valve while said inlet valve remains closed under pressure of said spring.

WILLIAM H. MCGUNAGLE. 

